ABAP Select data from SAP table QDWV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP QDWV table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to QDWV. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the QDWV table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_QDWV TYPE STANDARD TABLE OF QDWV,
      WA_QDWV TYPE QDWV,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <QDWV> TYPE QDWV.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_QDWV.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM QDWV
  INTO TABLE IT_QDWV.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QDWV
*  INTO TABLE @DATA(IT_QDWV2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_QDWV INDEX 1 INTO DATA(WA_QDWV2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_QDWV ASSIGNING <QDWV>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<QDWV>-STICHPRVER = 1.
<QDWV>-KURZTEXT = 1.
<QDWV>-AENDERKZ = 1.
<QDWV>-KOPIERVORL = 1.
<QDWV>-VERFTEXT = 1.

ENDLOOP.

LOOP AT IT_QDWV INTO WA_QDWV.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QDWV-FBKEY, sy-vline,
  WA_QDWV-FMKEY, sy-vline,
  WA_QDWV-FBKURZTEXT, sy-vline,
  WA_QDWV-FBNAME, sy-vline,
  WA_QDWV-KOPIEREN, sy-vline,
  WA_QDWV-VON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QDWV you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_QDWV TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_QDWV INTO WA_QDWV.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_QDWV_STR, 
STICHPRVER TYPE STRING,
KURZTEXT TYPE STRING,
AENDERKZ TYPE STRING,
KOPIERVORL TYPE STRING,
VERFTEXT TYPE STRING,
FBKEY TYPE STRING,
FMKEY TYPE STRING,
FBKURZTEXT TYPE STRING,
FBNAME TYPE STRING,
KOPIEREN TYPE STRING,
VON TYPE STRING,
NACH TYPE STRING,
MEHRFACHPR TYPE STRING,
KZTQSS1VER TYPE STRING,
KZMFSOH TYPE STRING,
KZMFSUN TYPE STRING,
KZMFSAB TYPE STRING,
KZPKTOH TYPE STRING,
KZPKTPM TYPE STRING,
KZPKTPV TYPE STRING,
KZPKTPP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QDWV_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_QDWV_STR-STICHPRVER sy-vline 
WA_QDWV_STR-KURZTEXT sy-vline 
WA_QDWV_STR-AENDERKZ sy-vline 
WA_QDWV_STR-KOPIERVORL sy-vline 
WA_QDWV_STR-VERFTEXT sy-vline 
WA_QDWV_STR-FBKEY sy-vline 
WA_QDWV_STR-FMKEY sy-vline 
WA_QDWV_STR-FBKURZTEXT sy-vline 
WA_QDWV_STR-FBNAME sy-vline 
WA_QDWV_STR-KOPIEREN sy-vline 
WA_QDWV_STR-VON sy-vline 
WA_QDWV_STR-NACH sy-vline 
WA_QDWV_STR-MEHRFACHPR sy-vline 
WA_QDWV_STR-KZTQSS1VER sy-vline 
WA_QDWV_STR-KZMFSOH sy-vline 
WA_QDWV_STR-KZMFSUN sy-vline 
WA_QDWV_STR-KZMFSAB sy-vline 
WA_QDWV_STR-KZPKTOH sy-vline 
WA_QDWV_STR-KZPKTPM sy-vline 
WA_QDWV_STR-KZPKTPV sy-vline 
WA_QDWV_STR-KZPKTPP sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.